Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf9a91948955a7c…

MALICIOUS

PDF

85.7 KB Created: 2021-09-05 15:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 64f25670a3289126debfa9cda2a5a130 SHA-1: cd0feb8cad68e5444535cc4f40e68ede82d08edf SHA-256: ccf9a91948955a7cfcd483b217a453c49bb104c8970f74549716a40f25287200
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and multiple links pointing to potentially compromised WordPress sites, suggesting it's part of a phishing campaign. The embedded JavaScript likely facilitates the download and execution of a secondary malicious payload, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, appears to be a lure related to stock market analysis to encourage user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/fd15aa539b7ebed9af2ed391c53435aa/jagivesi.pdf In PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/cqhse4f1in1m7qr4v4nmcfk849/63199533455.pdfIn PDF document text
    • https://limadelimon.com/images/file/25211430371.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d8dc155b7cb8cbc3be2a4836f49ae8d1/kasikelajegavedi.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a592278aeae---tenejese.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74e281e663---wujakelevewipugigal.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210725080823_6a5580.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/zulokaxokeloboramo.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/97516309621.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/92b8468adbfbdd89e8399be1bd289920/bumifekesu.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/82562530758.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f67357bd6---54139542828.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/sowodikutizuvotopusil.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/98725105911.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/50594810164.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/jasofebexigemedulu.pdfPDF link annotation
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/o3u1nrkcji89i4pqmcik8r29g4/xeliwumak.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/gukavuzu.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/jifiruzidusitezeta.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/21811769853.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210623_195435.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/6j72uepbp79rcmlrp3dd8u6t5s/85409101423.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c548da8c8---72350820990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=stock+market+fundamental+analysis+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 17676 bytes
SHA-256: c1a1f4083e42bb87deeb0112527a35d99c337c19277b6c0cd8dc0a5297f18edb
font_01_sfnt_off000116ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CE 11164 bytes
SHA-256: 781130893ce97027979fbd5dfdf23cba8f86f5094b4ef9df2b986a48b6526a84
font_02_sfnt_off000130ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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